CN102969140B - EI-type magnetic core production method and air gap cutting equipment - Google Patents
EI-type magnetic core production method and air gap cutting equipment Download PDFInfo
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Abstract
The invention relates to the field of EI-type magnetic core production and provides an EI-type magnetic core production method and air gap cutting equipment used for forming air gaps in the method. The EI-type magnetic core production method comprises the following steps of: firstly fabricating an integral magnetic core blank with two wire installation grooves, then sintering a magnetic core accessory and finally cutting two air gaps on the blank. The air gap cutting equipment comprises an equipment body and a transverse feeding mechanism. The equipment body is provided with a stand column. The stand column is provided with a longitudinal cantilever. The longitudinal cantilever is provided with two cutting units which are distributed along the extension direction of the longitudinal cantilever. Each cutting unit comprises a cutter and a driving mechanism which is used for driving the cutter, wherein the cutter comprises a cutting blade. The EI-type magnetic core production method and the air gap cutting equipment solve the problems that the production processes are manyultiple, the rate of non-defective products is low, the shape tidiness of the produced magnetic cores is poor, the inductance value of the magnetic cores is low and the stability is poor in the existing EI-type magnetic core production method.
Description
Technical field
The production method of EI type magnetic core and air gap cutting equipment
Background technology
EI type magnetic core has to be applied comparatively widely, such as, all adopt this kind of structure at SMD transformer, inductance core etc.The method of existing production EI type magnetic core is, first produces E-type magnetic sheet 1 as shown in Figure 2 and I type magnetic sheet 2 as shown in Figure 3 respectively.See Fig. 2, E-type magnetic sheet 1 is provided with wire mounting groove 11 and two air-gap surfaces 12 that two extend three faces of full E-type magnetic sheet 1.See Fig. 1, then adopt bonding agent E-type magnetic sheet 1 and I type magnetic sheet 2 to be bonded together and form EI type magnetic core.Two air gaps 13 are surrounded between two air-gap surfaces 12 and I type magnet.For ensureing that E-type magnetic sheet and the smooth of the bonding plane of I type magnetic sheet need increase plain grinding manufacturing procedure, therefore production process is loaded down with trivial details.Due to the distortion of the I magnetic sheet that causes in sintering process and air-gap surface 12, the undesirable defective products of air gap 13 when E-type magnetic sheet is bonded together with I type magnetic sheet can be produced produce, simultaneously because operation is many, each procedure all can produce certain learies, and the yields of product is low.Why to adopt the mainly conveniently processing of air-gap surface 12 in E shape magnetic sheet of this kind of mode of production.When being produced by this kind of mode, because E-type magnetic sheet and I type magnetic sheet are linked together by the mode of bonding, can cause that EI type magnetic core outward appearance is irregular, magnet exists the problems such as tomography, magnet tomography easily makes magnet magnetic saturation and generates heat, the inductance value of magnetic core is declined, the poor stability of magnet magnetic characteristic.
Chinese Patent Application No. be 2009101530293, date of publication be May 12 in 2010 day, be called the equipment disclosing a kind of air-gap surface made on E-type magnetic sheet in the patent documentation of " the two air gap bistrique passing through type grinder of a kind of mill magnetic core ".
China Patent No. be 921136722, publication date be September 1 in 1993 day, be called in the patent documentation of " grinding transformer " application disclosed about EI type magnetic core.
Summary of the invention
The invention provides a kind of EI type magnetic core production method and in the method for the formation of the air gap cutting equipment of air gap, solve the outward appearance regularity difference of the magnetic core that the production process existing for production method is many, yields is low and produced of existing EI type magnetic core and the problem of the low poor stability of inductance value of magnetic core.
Above technical problem is solved by following technical proposal: a kind of production method of EI type magnetic core, the first step, produces the magnetic core blank of the integrative-structure with two wire mounting grooves; Second step, magnetic core blank to be sintered and obtained magnetic core semi-finished product; 3rd step, on magnetic core semi-finished product, cut out two articles of air gaps and obtained EI type magnetic core.Not there is air gap and the blank with wire mounting groove sinters by first producing, sinter at blank and produce air gap by the mode of cutting again, can avoid causing the undesirable phenomenon of air gap due to sintering warpage and scrapping of producing, owing to having reduced the number of process operation, therefore the yields of product is high.The EI type magnetic core produced by this operation is structure as a whole, and there will not be the problem of inductance value decline and the magnetic core magnetic character constancy difference caused because of tomography.
As preferably, in the third step to keep the constant mode in magnetic core semi-finished product position that is constant relative to the position of feed mechanism and maintenance cutter unit to cut out two air gaps.Article two, air gap synchronous cutting, efficiency when not only cutting out air gap is high, cutting time convenience good, and the accuracy of relative position between cut out two air gaps good, be not easy to produce and that scrap phenomenon undesirable due to air gap relative position.If the position changing magnetic core semi-finished product or cutting tool after well cutting one air gap is again gone to cut another air gap, inconvenience when then not only cutting, also can increase the error of the relative position between two air gaps, thus the undesirable and phenomenon of scrapping of air gap relative position can be produced.
As preferably, in a first step, " V " shape feed guiding groove that width is greater than width of air gap is also set on two relative sides of magnetic core blank.To facilitate accurately entering of cutting blade in the air gap course of processing.Improve the accuracy of gap position.The breakage on EI magnetic core surface can not be caused during feed, ensure that the planarization of product appearance.
A kind of air gap cutting equipment, comprise fuselage and transverse feed mechanism, fuselage is provided with column, column is provided with longitudinal cantilever, longitudinal cantilever is provided with the cutter unit of two longitudinally cantilever bearing of trend distributions, cutter unit comprises cutting tool and drives the driving mechanism of cutting tool, and cutting tool comprises cutting blade; Spacing distance between two air gaps that during cutting, the cutting blade in two cutting tools is in the same plane, spacing distance between cutting blade in two cutting tools is less than on EI type magnetic core.During use, magnetic core semi-finished product are arranged on transverse feed mechanism, the position of adjustment cutting blade makes cutting blade and feed guiding groove is in the same plane, make magnetic core semi-finished product between the cutting blade of two cutting tools, then rotated by cutting blade during driving mechanism, transverse feed mechanism drives magnetic core semi-finished product to pass between two cutting tools, and the synchronous cutting on magnetic core semi-finished product of the cutting blade on two cutting tools goes out two air gaps.
As preferably, described transverse feed mechanism comprises transversely movable cross slide, and cross slide is provided with magnechuck and position block.Power to magnechuck during use, EI type magnetic core magnetic to be cut is adsorbed on magnetic conduction supporting seat by magnechuck, and it is mobile to prevent EI type magnetic core position to be cut in cutting process from producing.Handling magnetic core time convenient and strength-saving, can not to magnetic core surface produce hurt.At the multiple magnetic core of the consistent proper alignment of magnetic conduction sucker, can cut continuously, continuous feed carried out to multiple magnetic core, to improve cutting efficiency during charging.
Described magnechuck is provided with magnetic conduction supporting seat, and the cross section of described magnetic conduction supporting seat is " convex " font, and position block is arranged on the shoulder of magnetic conduction supporting seat.This design can give the feed motion vacating space of cutting tool under the compact prerequisite of holding structure.
As preferably, described position block is that permeability magnetic material is made.The fixed effect to magnetic core can be improved.
As preferably, described driving mechanism comprises drive motors and is connected to the motor mount on longitudinal cantilever, motor mount is provided with motor containing hole, opening, spreading groove and the screwed hole for closing up spreading groove, opening and spreading slot are in the both sides of motor containing hole and combine as a whole with motor containing hole, and drive motors to be located in motor containing hole and to coordinate described screwed hole to be fixed together with motor mount by bolt.The method of motor mount fixed drive motor is: first unclamp bolt, be located in by drive motors in motor installing hole, then clamping screw, in the process of clamping screw, spreading groove closes up, motor installing hole is closed up together, thus motor mount is held tightly on drive motors.Convenient during the high and loading drive motor of quality of fit.
As preferably, the side face of described cutting blade is provided with some cooling fluid lead-in grooves along the distribution of cutting blade circumference.The importing of cooling water when being convenient to cut.Effective when cutting blade is cooled.
As preferably, described longitudinal cantilever is liftably connected on described column, and described longitudinal cantilever is also provided with balancing weight, and balancing weight and cutter unit are positioned at the both sides of column.When being come by the height changing longitudinal cantilever, the position of cutting blade is with the half-finished air gap height coupling of magnetic core, and versatility is good.The moment that simultaneously longitudinal cantilever can be made to be positioned at the both sides of column is balanced, and is conducive to ensureing that cutting blade is with the half-finished depth of parallelism of magnetic core.The accuracy of the position of the air gap cut out is good.The lifting of longitudinal cantilever can adopt the modes such as chain lifting, hydraulic lifting.
The present invention has following advantage, by by one-body molded for EI type magnetic core and cut out air gap more after sintering, can avoid causing the undesirable phenomenon of air gap due to sintering warpage and scrapping of producing, simultaneously also evade the technical barrier that the degree of depth causes mould to make deeply because width of air gap is too little, production process is minimized, the yields of product has been improved, there will not be the problem of inductance value decline and the magnetic core magnetic character constancy difference caused because of tomography.Air gap cutting equipment can carry out synchronous cutting to two air gaps, the convenience during production improved further and yields.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing EI type magnetic core.
Fig. 2 is the structural representation of existing E-type magnetic sheet.
Fig. 3 is the structural representation of existing I type magnetic sheet.
Fig. 4 is the structural representation of magnetic core blank of the present invention.
Fig. 5 is the structural representation of EI type magnetic core of the present invention.
Fig. 6 is the close-up schematic view at the A place of Fig. 5.
The front elevational schematic of Fig. 7 air gap cutting equipment of the present invention.
Fig. 8 is the schematic top plan view of motor mount of the present invention.
Fig. 9 is that the B-B of cutter unit in Fig. 7 and longitudinal cantilever analyses and observe enlarged diagram.
Figure 10 is the perspective view of cutting tool of the present invention.
Figure 11 is the annexation schematic diagram between longitudinal cantilever and column.
Figure 12 is the close-up schematic view of the using state of air gap cutting equipment of the present invention.
Figure 13 is by schematic top plan view during transverse feed mechanism loading magnetic core semi-finished product.
In figure: E-type magnetic sheet 1, wire mounting groove 11, air-gap surface 12, air gap 13, feed guiding groove 14, I type magnetic sheet 2, magnetic core blank 3, fuselage 4, vertical planker 41, vertical planker rocking handle 42, column 43, transverse feed mechanism 5, horizontal supporting plate control switch 51, cross slide 52, magnechuck 53, magnetic conduction supporting seat 54, the right shoulder 541 of magnetic conduction supporting seat, position block 55, longitudinal cantilever 6, screw mandrel mounting panel 61, vertical screw mandrel 62, cutter unit moves rocking handle 63, vertical hair bar 64, plane bearing 65, longitudinal cantilever drive nut 66, driven angular wheel 67, longitudinal cantilever elevation rocking handle 68, drive link 69, initiatively angular wheel 60, cutter unit 7, cutting tool 71, blade driving shaft 711, determine flange 712, dynamic flange 713, cutting blade 714, cooling fluid lead-in groove 7141, insert retention nut 715, driving mechanism 72, sliding seat 721, motor mount 722, motor containing hole 7221, opening 7222, spreading groove 7223, first screwed hole 7224, second screwed hole 7225, stress disappears and stops groove 7226, drive motors 723, motor power output shaft 7231, set lever 724, bolt 725, sliding seat drive nut 726, balancing weight 8, magnetic core semi-finished product 9, the width H1 of feed guiding groove, the width H2 of air gap, spacing distance H3 between cutting blade in two cutting tools, article two, the spacing distance H4 between air gap.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is further illustrated.
See Fig. 7, a kind of air gap cutting equipment, comprises fuselage 4.Fuselage 4 is provided with vertical planker 41, vertical planker rocking handle 42, horizontal supporting plate control switch 51, longitudinal cantilever elevation rocking handle 68 and column 43.Vertical planker 41 is provided with transverse feed mechanism 5.
Transverse feed mechanism 5 comprises can being transversely arranged on the cross slide 52 on vertical planker 41, the magnechuck 53 be fixed on cross slide 52, being arranged on magnetic conduction supporting seat 54 on magnechuck 53 and position block 55 of (namely in figure perpendicular to the direction of paper) movement.Magnechuck 53, magnetic conduction supporting seat 54 and position block 55 are all the strip of i.e. horizontal expansion along the longitudinal direction.The cross section of magnetic conduction supporting seat 54 is " convex " font.Position block 55 is arranged on the right shoulder 541 of magnetic conduction supporting seat.Position block is arranged on the side towards column, convenient during handling magnetic core semi-finished product.Position block 55 is made for iron, certainly can with other permeability magnetic material making.
Column 43 is provided with longitudinal cantilever 6 of i.e. longitudinal extension in left-right direction.Longitudinal cantilever 6 is provided with two cutter units 7 and balancing weight 8.Balancing weight 8 is positioned at the right side of column 43.Cutter unit 7 is positioned at the left side of column 43.Cutter unit 7 is distributed on vertical cantilever 6 in left-right direction.The left part of longitudinal cantilever 6 is welded with screw mandrel mounting panel 61.Screw mandrel mounting panel 61 is threaded the vertical screw mandrel 62 extended in left-right direction.The left end of vertical screw mandrel 62 is connected with cutter unit and moves rocking handle 63.
Cutter unit 7 comprises cutting tool 71 and driving mechanism 72.
The motor mount 722 that driving mechanism 72 comprises the sliding seat 721 be slidably connected on longitudinal cantilever 6, drive motors 723 and is fixed on sliding seat.Set lever 724 is provided with between sliding seat 721 and longitudinal cantilever 6.Drive motors 723 is vertically arranged.
See Fig. 8, the stress that motor mount 722 is provided with motor containing hole 7221, opening 7222, spreading groove 7223, first screwed hole 7224, second screwed hole 7225 and is positioned at spreading groove 7223 end disappears only groove 7226.Opening 7222 and spreading groove 7223 are positioned at the left and right sides of motor containing hole 7221 and join together with motor containing hole 7221.Composition graphs 7, coordinates the second screwed hole 7225 to be locked together by bolt between sliding seat 721 and motor mount 722.Drive motors 723 to be located in motor containing hole 7221 and to coordinate the first screwed hole 7224 to be fixed together with motor mount 722 by bolt 725.
See Fig. 9, that sliding seat being positioned at left in two sliding seats 721 is welded with sliding seat drive nut 726.Vertical screw mandrel 62 is threaded on sliding seat drive nut 726.Cutting tool 71 comprises blade driving shaft 711 that upper end is coaxially fixed together with motor power output shaft 7231, be fixed in determining flange 712, with determining the supporting dynamic flange 713 of flange 712, be clamped in the cutting blade 714 determined between flange 712 and dynamic flange 713 and be threaded in the insert retention nut 715 clamping cutting blade 714 for making to determine flange 712 and dynamic flange 713 of blade driving shaft 711 hypomere on blade driving shaft 711 lower end.
See Figure 10, the side face of cutting blade 714 is provided with 16 cooling fluid lead-in grooves 7141 along the distribution of cutting blade circumference.
See Figure 11, column 43 is hollow structure.Vertical hair bar 64 is hung with in column 43.Vertical hair bar 64 is provided with plane bearing 65 with the junction of column 43.Longitudinal cantilever 6 is provided with longitudinal cantilever drive nut 66 that same vertical hair bar 64 matches.The lower end of vertical hair bar 64 is provided with driven angular wheel 67.Longitudinal cantilever elevation rocking handle 68 is connected to the left end of drive link 69.The right-hand member of drive link 69 is provided with the active angular wheel 60 be engaged on driven angular wheel 67.
A production method for EI type magnetic core,
See Fig. 4, the first step, produce the magnetic core blank 3 of the integrative-structure with two wire mounting grooves 11.The left and right side of magnetic core blank 3 is respectively provided with " V " shape feed guiding groove 14 that is the length direction extension of magnetic core blank along the longitudinal direction.
Second step, magnetic core blank 3 to be sintered and obtained magnetic core semi-finished product.
See Fig. 5, the 3rd step, on magnetic core semi-finished product, cut out the EI type magnetic core of two articles of air gaps 13 and obtained integrative-structure.
See Fig. 6, the width H1 of feed guiding groove is greater than the width H2 of air gap.
Carry out operation by above-mentioned air gap cutting equipment when cutting air gap in the 3rd step.The concrete grammar being cut out air gap by air gap cutting equipment of the present invention is:
See Figure 13, by 12 magnetic core semi-finished product 9 along the longitudinal direction word order on magnetic conduction supporting seat 54, the right flank of magnetic core semi-finished product 9 is with position block 55 snap, power to magnetic conduction sucker 53, under the effect of magnetic conduction sucker 53 magnetic force, together with magnetic core semi-finished product 9 are absorbed and fixed at magnetic conduction supporting seat 54, under the effect of magnetic core semi-finished product 9 own magnetic force, magnetic core semi-finished product 9 are fixed together with position block 55.
See Fig. 7, unclamp bolt 725, the upper-lower position of adjustment cutting tool 71 is in the same plane to the cutting blade 714 in two cutting tools 71.
See Figure 11, rotate longitudinal cantilever elevation rocking handle 68, longitudinal cantilever elevation rocking handle 68 drives that drive link 69 rotates, drive link 69 drives initiatively angular wheel 60 to rotate, initiatively angular wheel 60 drives that driven angular wheel 67 rotates, driven angular wheel 67 drives that vertical hair bar 64 rotates, vertical hair bar 64 drives longitudinal cantilever drive nut 66 to be elevated, longitudinal cantilever drive nut 66 drives longitudinal cantilever 6 to be elevated.
See Figure 12, when longitudinal cantilever elevation enters to cutting blade 714 is same the lifting then stopping longitudinal cantilever when guiding groove 14 aligns.
See Fig. 7 and composition graphs 9 and Figure 12, unclamp in two cutter units 7 set lever 724 on that cutter unit being positioned at left side, rotate that cutter unit moves rocking handle 63, cutter unit moves rocking handle 63 and coordinates sliding seat drive nut 726 to drive that cutter unit being positioned at left side to move left and right on longitudinal cantilever 6 by vertical screw mandrel 62.When moving to the spacing distance H4 between two air gaps that the spacing distance H3 between the cutting blade in two cutting tools is less than on EI type magnetic core, the cutter unit that stops operating moves rocking handle 63, locking set lever 724.
See Fig. 7 and in conjunction with Figure 12, drive vertical planker 41 to move left and right by vertical planker rocking handle 42, when moving to magnetic core semi-finished product 9 and being positioned at the middle of two cutting blades 714, stop the vertical planker rocking handle 42 of shake.The mode of the vertical planker 41 of vertical planker rocking handle 42 driving moves rocking handle 63 with above-mentioned cutter unit and drives the mode of cutter unit identical.
See Fig. 7 and Figure 13, horizontal trailing arm CD-ROM drive motor (not drawing in figure) is started by horizontal supporting plate control switch 51, make feed mechanism 5 according to the C in Figure 13 to movement, when being positioned at all magnetic core semi-finished product 9 on feed mechanism 5 all through cutting tool 71, the cutting blade 714 on cutting tool 71 cuts out two air gaps 13 on magnetic core semi-finished product 9.When cutting out two air gaps by this equipment, be do not change magnetic core semi-finished product to cut out relative to the mode with the position of feed mechanism and the position of not moving cutter unit, not only efficiency is high, and quality better.Also will by cooling fluid conveying device (not drawing in figure) conveying cooling fluid on the surface of cutting blade 714 in cutting process.
Another does not draw in the embodiment of figure, and horizontal supporting plate 52 is by manually dragging.
Claims (8)
1. the production method of an EI type magnetic core, it is characterized in that, air gap cutting equipment is adopted, described air gap cutting equipment comprises fuselage and transverse feed mechanism, fuselage is provided with column, and column is provided with longitudinal cantilever, and longitudinal cantilever is provided with the cutter unit of two longitudinally cantilever bearing of trend distributions, cutter unit comprises cutting tool and drives the driving mechanism of cutting tool, and cutting tool comprises cutting blade; During cutting, spacing distance between two air gaps that cutting blade in two cutting tools is in the same plane, spacing distance between cutting blade in two cutting tools is less than on EI type magnetic core, the first step, produces the magnetic core blank of the integrative-structure with two wire mounting grooves; Second step, magnetic core blank to be sintered and obtained magnetic core semi-finished product; 3rd step, on magnetic core semi-finished product, cut out two articles of air gaps and obtained EI type magnetic core; In the third step to keep the constant mode in magnetic core semi-finished product position that is constant relative to the position of transverse feed mechanism and maintenance cutter unit to cut out two air gaps.
2. one kind is applicable to the air gap cutting equipment in the production method of EI type magnetic core as claimed in claim 1, it is characterized in that, comprise fuselage and transverse feed mechanism, fuselage is provided with column, column is provided with longitudinal cantilever, longitudinal cantilever is provided with the cutter unit of two longitudinally cantilever bearing of trend distributions, and cutter unit comprises cutting tool and drives the driving mechanism of cutting tool, and cutting tool comprises cutting blade; Spacing distance between two air gaps that during cutting, the cutting blade in two cutting tools is in the same plane, spacing distance between cutting blade in two cutting tools is less than on EI type magnetic core.
3. air gap cutting equipment according to claim 2, is characterized in that, described transverse feed mechanism comprises transversely movable cross slide, and cross slide is provided with magnechuck and position block.
4. air gap cutting equipment according to claim 3, is characterized in that, described magnechuck is provided with magnetic conduction supporting seat, and the cross section of described magnetic conduction supporting seat is " convex " font, and position block is arranged on the shoulder of magnetic conduction supporting seat.
5. air gap cutting equipment according to claim 4, is characterized in that, described position block is that permeability magnetic material is made.
6. according to the air gap cutting equipment described in Claims 2 or 3 or 4 or 5, it is characterized in that, described driving mechanism comprises drive motors and is connected to the motor mount on longitudinal cantilever, motor mount is provided with motor containing hole, opening, spreading groove and the screwed hole for closing up spreading groove, opening and spreading slot are in the both sides of motor containing hole and combine as a whole with motor containing hole, and drive motors to be located in motor containing hole and to coordinate described screwed hole to be fixed together with motor mount by bolt.
7. according to the air gap cutting equipment described in Claims 2 or 3 or 4 or 5, it is characterized in that, the side face of described cutting blade is provided with some cooling fluid lead-in grooves along the distribution of cutting blade circumference.
8. according to the air gap cutting equipment described in Claims 2 or 3 or 4 or 5, it is characterized in that, described longitudinal cantilever is liftably connected on described column, and described longitudinal cantilever is also provided with balancing weight, and balancing weight and cutter unit are positioned at the both sides of column.
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| CN201210218858.6A CN102969140B (en) | 2012-06-29 | 2012-06-29 | EI-type magnetic core production method and air gap cutting equipment |
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| CN108788308A (en) * | 2017-05-04 | 2018-11-13 | 浙江宁巍机械科技有限公司 | A kind of full-automatic formwork cutting machine of double-station |
| CN107186265A (en) * | 2017-06-17 | 2017-09-22 | 彭波 | A kind of cutter device of double workpiece |
| CN108273638B (en) * | 2018-03-21 | 2023-05-12 | 江西尚朋电子科技有限公司 | Soft magnetic core cutting system |
| CN110281404A (en) * | 2019-05-16 | 2019-09-27 | 湖南艾迪奥电子科技有限公司 | A kind of Multi-wire cutting device of magnetic core |
| CN110465693A (en) * | 2019-06-25 | 2019-11-19 | 浙江尚品店配信息科技有限公司 | A kind of cutting means for clothes showing shelf crossbeam |
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